The addition of cryoprotectants is a necessary step in cryopreservation procedures because they can minimize cellular injury during cryopreservation. Toxicity of cryoprotectant depends on the type, concentration, temperature and exposure period. The aim of this study was to investigate the toxicity of cryoprotectant to embryos of banded coral shrimp (Stenopus hispidus) in order to inform the development of a cryopreservation protocol. Three stages of embryonic development (eye-formation, heart beat and pre-hatch stage) embryos were selected and exposed to different concentration of cryoprotectants (0.25M-5M) for an equilibration period of 10, 20 or 30 min at room temperature. Hatching percentage indicated that the toxicity of tested cryoprotectants increased in the order of methanol, ethylene glycol (EG), dimethyl sulphoxide (DMSO), glycerol and dimethylacetamide (DMA). The No Observed Effect Concentrations (NOECs) for eye-formation stage embryos were 1M, 0.25M, 0.25M, 0.25M and 0.25M respectively after 10 min incubation whilst the NOECs for heart beat and pre-hatch stage embryos were 1M, 0.5M, 0.5M, 0.5M and 0.25M respectively. Pre-hatch stage embryos appeared to be more tolerant to cryoprotectant toxicity than eye-formation and heart beat stage embryos.
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BANDED CORAL SHRIMP (STENOPUS HISPIDUS);
Document Type: Research Article
Publication date: September 1, 2009
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CryoLetters is a bimonthly international journal for low temperature sciences, including cryobiology, cryopreservation or vitrification of cells and tissues, chemical and physical aspects of freezing and drying, and studies involving ecology of cold environments, and cold adaptation
The journal publishes original research reports, authoritative reviews, technical developments and commissioned book reviews of studies of the effects produced by low temperatures on a wide variety of scientific and technical processes, or those involving low temperature techniques in the investigation of physical, chemical, biological and ecological problems.